Married to the Empire's Number One She-Devil Episode 51

Modern college student Simon Lowe transmigrates into the Daqoria Dynasty as a notorious playboy. His father arranges for him to marry into the influential Clark family for protection, and so he becomes Leah Clark’s husband. The crown prince, Calvin Howard, is obsessed with her, so Leah and Simon form an alliance to defend against him. Using his modern knowledge and wit, Simon foils Calvin’s schemes. As he witnesses Calvin’s unjust rule, he eventually stages an uprising.